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How much phosphorus in grams is required to release 282.79 kJ of heat?
5 Ni + 2 P -> Ni5P2
△ H= 436 kJ/mol
How much energy in kJ is released when 124.49 g of nickel react with an excess of phosphorus?
5 Ni + 2 P -> Ni5P2
△ H= 436 kJ/mol
How much energy in kJ is released when 10.06 g of aluminum react with an excess of copper oxide?
3 CuO + 2 Al -> 3 Cu + Al2O3
△ H
= 1190 kJ/mol
40 g of solute are present in 140 g of solution. What is the weight fraction of solute in solution? We dissolved 20 g of sugar in 70 g of water. What% of sugar solution was formed? From 50 g of salt we prepared a solution with a weight fraction of 0.2. What is the total weight of the solution and what is the volume of water used? How much g of sodium hydroxide do we need to prepare 300 g of a 12% solution?
If 19.22 grams of aluminum is heated from 15 oC to 50 oC how much energy was required?
sAl = 0.897 J/(gK)
What is the mass of iron if 842.05 joules are added and the temperature moves from 25 oC to 28 oC?
sFe = 0.449 J/(gK)
After it had cooled the dry marble and test tube weighed 17.56 g. I know it is difficult to see the tick marks for the volume of gas in the video so by the end I collected 35.3 mL of CO2. Calculate the theoretical yield of CO2 in liters (do a stoichiometry problem use three decimals)
After it had cooled the dry marble and test tube weighed 17.56 g. I know it is difficult to see the tick marks for the volume of gas in the video so by the end I collected 35.3 mL of CO2. Calculate the moles of calcium carbonate (marble) reacted (use 3 decimals)
If 86.33 grams of sodium reacts with an excess of chlorine, what amount of
Salt (sodium chloride) will be produced?
Sodium + chlorine ® sodium chloride Na + Cl2 ® NaCl
Calculate the pH and the pOH of the solution at 25 c for 0.0031 M Ca(OH)2
